mirror of https://gitee.com/bigwinds/arangodb
159 lines
6.9 KiB
C
159 lines
6.9 KiB
C
////////////////////////////////////////////////////////////////////////////////
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/// @brief Ahuacatl, query language functions
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_AHUACATL_AHUACATL__FUNCTIONS_H
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#define ARANGODB_AHUACATL_AHUACATL__FUNCTIONS_H 1
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#include "Basics/Common.h"
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#include "Ahuacatl/ahuacatl-ast-node.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- forward declarations
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// -----------------------------------------------------------------------------
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struct TRI_aql_context_s;
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struct TRI_aql_field_access_s;
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struct TRI_associative_pointer_s;
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// -----------------------------------------------------------------------------
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// --SECTION-- public defines
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief default namespace for aql functions
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////////////////////////////////////////////////////////////////////////////////
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#define TRI_AQL_DEFAULT_NAMESPACE "_AQL"
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////////////////////////////////////////////////////////////////////////////////
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/// @brief separator between namespace and function name
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////////////////////////////////////////////////////////////////////////////////
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#define TRI_AQL_NAMESPACE_SEPARATOR ":"
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////////////////////////////////////////////////////////////////////////////////
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/// @brief separator between namespace and function name
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////////////////////////////////////////////////////////////////////////////////
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#define TRI_AQL_NAMESPACE_SEPARATOR_CHAR ':'
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////////////////////////////////////////////////////////////////////////////////
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/// @brief default namespace for aql functions
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////////////////////////////////////////////////////////////////////////////////
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#define TRI_AQL_DEFAULT_PREFIX TRI_AQL_DEFAULT_NAMESPACE TRI_AQL_NAMESPACE_SEPARATOR
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// -----------------------------------------------------------------------------
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// --SECTION-- public types
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief query function data structure
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////////////////////////////////////////////////////////////////////////////////
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typedef struct TRI_aql_function_s {
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char* _externalName;
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char* _internalName;
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bool _isDeterministic;
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bool _isGroup;
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char* _argPattern;
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size_t _minArgs;
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size_t _maxArgs;
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void (*optimise)(const TRI_aql_node_t* const, struct TRI_aql_context_s* const, struct TRI_aql_field_access_s*);
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}
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TRI_aql_function_t;
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialise the array with the function declarations
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////////////////////////////////////////////////////////////////////////////////
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struct TRI_associative_pointer_s* TRI_CreateFunctionsAql (void);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief free the array with the function declarations
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////////////////////////////////////////////////////////////////////////////////
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void TRI_FreeFunctionsAql (struct TRI_associative_pointer_s*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief return a function, looked up by its external name
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////////////////////////////////////////////////////////////////////////////////
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TRI_aql_function_t* TRI_GetByExternalNameFunctionAql (struct TRI_associative_pointer_s*,
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const char* const);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get internal function name for an external one
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////////////////////////////////////////////////////////////////////////////////
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const char* TRI_GetInternalNameFunctionAql (const TRI_aql_function_t* const);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief register a function name
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_RegisterFunctionAql (struct TRI_associative_pointer_s*,
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const char* const,
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const char* const,
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const bool,
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const bool,
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const char* const,
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void (*)(const TRI_aql_node_t* const, struct TRI_aql_context_s* const, struct TRI_aql_field_access_s*));
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////////////////////////////////////////////////////////////////////////////////
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/// @brief check whether a function argument must be converted to another type
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_ConvertParameterFunctionAql (const TRI_aql_function_t* const,
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const size_t);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief validate the arguments passed to a function
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_ValidateArgsFunctionAql (struct TRI_aql_context_s* const,
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const TRI_aql_function_t* const,
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const TRI_aql_node_t* const);
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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